New, better video:
This is my golfball gun, it features a 2" barrel sealing piston with 1.5" porting. The chamber is made from 2" Pressure Rated PVC pipe and the barrel is 1.5" PVC pipe. For more information go to:
Big Thanks to Nicholas Benigni, owner of SpudGunExtreme.com
You can find his website and spudgun products here:
Note: In the video I am wearing safety glasses you just can't see me, the shot at the end without them is perfectly safe as I was only firing air.
I also have more then enough objects as a back stop to make certain the projectile doesn't go all the way.
One shot I am firing into the open, I was shooting a golfball 380m at a golf course that was closed due to weather 50m away.
You may need to use some Lube to help the piston slide easier:
Step 1: How it works:
2) Once the air is equalized all around the chamber and valve, the inlet valve is closed.
3) When you want to fire, you open the pilot valve and all the air behind the piston(pilot area) vents out this valve, since the pressure on the piston is un-equalized with more pressure at the front pushing it back, then pushing it forward the piston actuates.
4) The piston flies back at incredible speed and all the air goes out the barrel and launches the projectile.
That's how simple it is.